Btrfs: check the nodatasum flag when writing compressed files
If mounting with nodatasum option, we won't csum file data for general write or direct-io write, and this rule should also be applied when writing compressed files. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -338,6 +338,7 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
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u64 first_byte = disk_start;
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struct block_device *bdev;
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int ret;
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int skip_sum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM;
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WARN_ON(start & ((u64)PAGE_CACHE_SIZE - 1));
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cb = kmalloc(compressed_bio_size(root, compressed_len), GFP_NOFS);
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@ -392,8 +393,11 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
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ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0);
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BUG_ON(ret);
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ret = btrfs_csum_one_bio(root, inode, bio, start, 1);
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BUG_ON(ret);
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if (!skip_sum) {
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ret = btrfs_csum_one_bio(root, inode, bio,
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start, 1);
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BUG_ON(ret);
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}
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ret = btrfs_map_bio(root, WRITE, bio, 0, 1);
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BUG_ON(ret);
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@ -418,8 +422,10 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
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ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0);
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BUG_ON(ret);
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ret = btrfs_csum_one_bio(root, inode, bio, start, 1);
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BUG_ON(ret);
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if (!skip_sum) {
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ret = btrfs_csum_one_bio(root, inode, bio, start, 1);
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BUG_ON(ret);
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}
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ret = btrfs_map_bio(root, WRITE, bio, 0, 1);
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BUG_ON(ret);
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